Mount Roraima

Mount Roraima is the highest of the Pakaraima chain of tepui plateau in South America.:156 First described by the English explorer Sir Walter Raleigh in 1596, its 31 km2 summit area:156 is defended on all sides by tall cliffs rising 400 metres (1,300 ft). The mountain also serves as the triple border point of Venezuela, Brazil and Guyana.:156